Jabbing- machine



Dec. 9, 24- Re. 15,959

D .c. COBLE JARRING momma Original Filed may '2 1919 2 Sheets-Sheet 1INVENTOR BY 10am ATTORNEYS Dec. 9,1924.

D .c. COBLE JARRING MACHINE Original Filed May 1919 2 Sheets-SheetINVENTOR AM a, BY 779mm;

ATTORNEYS Reissued Dec. 9, 1924.

UNITED STATES DAVID C. OOBLE, OF ELIZABETHTOWN, PENNSYLVANIA.

JARBING MACHINE.

Original I0. 1,328,877, dated December 2, 1919, Serial 170. 299,107,filed Kay 23, 1919. Application for reissue filed November 16, 1921.

fication.

with a This invention relates to improvements in machines for use infoundries for jarring molds, cores, etc., or for use in chocolatefactories for jarring chocolates in molds, and the like.

One of the objects of the invention is to simplif the construction andto do away arts which are liable to become cloose by t e jarring actionand to provide a machine in which only a small amount of power isrequired to raise the table.

Another object of the invention is to provide means for freeing the handlever or power shaft from the mechanism when the table is dropping so asto prevent the jarring -motion from being communicated to the driveshaft or the operator using the hand lever.

" Still another object of the invention is to rovide means whereby anumber of toggle vers are used, which are connected to a le shaft, forraising the table.

he invention also consists in certain other features of construction andin the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

. In describing my invention in detail, reference will be had to theaccompanying drawings, wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is an elevation of the invention; Fig. 2 is a horizontal section on line22 of Fig. 1;

I Fig. 3 is a cross section on line 3-3 of Fig. 1;

Fig. 4 is a view similar to Fig. 1, but

' taken from the opposite side;

5 is a detailed View. s In these views 1 indicates a casing ofsubstantially ectangular form and through which passes a shaft 2. Thisshaft is journaled in the sides of the casing with its ends projectingtherefrom. Each of the project- Serial No. 515,789.

ing ends of the shaft carries an arm 3 which v1s connected with theshaft midway its ends.

Each end of each arm 3 is pivotally connected with a forked member 4 and.the outerend of each of the forked members is provided with a screwthreaded socket to receive the screw-threaded end of a rod 5. Each rodis provided with a hexagonal central part 6 and the other end of the rodis screw-threaded in a different direction from the first mentioned end.This other end of the rod engages thescrew-threaded socket in a forkedmember 7 which is connected with the pivotal point of the toggle levers8which connect the top plate 9 with the casing. As will be seen, the rods5 and their connecting members form a turn buckle construction by whichthe parts may be easily and quickly adjusted.

As. will b seen there is a air of toggles on each of the two sides of te casingwith the upper link 10 of each set connected with a corner ofthe plate 9. Each of the lower links 11 is provided with a sleeve 12which engages a pm 13 projectin from the casing. The toggles of each setan the forked member 7 are connected together by the pin '14 which isheld in place by the usual cotter pins so that there is no danger ofjarring the parts loose. The interior walls of the casing carry theguide members 15 with which enage the pins 16 projecting downwardly romthe lower face of the late 9. The interior walls of the casing a so areprovided with the upwardly projecting parts 17 which extend above theupper edges of the casing and have their tops flat and these parts areadapted to be engaged by the depending parts 18 on the bottom side oftheplate 9 which are also provided with fiat ends so that when the plateor table 9 drops and these flat ends come together the table and themolds carried thereby, will be jarred. I provide cross pieces 19 acrossthe top of the casin and the top edges of these cross pieces may heprovided with projections similar to those shown at 17 and theseprojections are engaged by similar projections on the bottom of thetable.

The rockshaft 2 may beactuated by hand or b power. In order to rock the.shaft by hand I provide a sector 20 on one end of said shaft which isprovided with a curved slot 23 is an arm connected with the shaft andcarrying g1 pin 24 which is adapted to engage the slo In this way whenthe pin engages the end of the slot, the sector and shaft will move withthe lever so as to straighten out the toggle levers and thus lift thetable or plate, and as soon as said lever passes the dead center thetable will elro resulting iock will be prevented rom bein communicatedto the arms of .the operator y the slot 21 freeing the pin from thesector. The shaft may be driven by power by means of the followingarrangeinent of arts. Within the casing the shaft is rovid ed' with acrank or arm 25 and a l 26*has one end pivoted to said arm. This linkpasses through a slot 27 in one end of the-casing and the end of saidlink is slotted ,as at -28. This slot engages a crank pin 29 on a disk30 which is connected with "a shaft 31 journaled in brackets 32 securedto the end of the casing. A second shaft 33 is also journaled in saidbrackets and the two shafts are provided with the ears '34 which meshwith each other. The s aft 33 is provided with a pulley 35 which isadapted to receive a belt or the like for transmitting power from amotor or other suitable source of power to said shaft. If desired, thepulley may be replaced b a crank so that the shafts may be rotated yhand. $3 roviding the link 26 with the slot 28 the s ock or jar of thefalling table is removed from the .driving mechanism as this slotpermits the link to be moved without moving the pin on the disk.

It will thus be seen that all jar and vibrations are prevented frombeing transmitted to the driving mechanism or to the operator and by thearrangement shown each movement of the hand lever will result in a dropof the table and every revolution of the crank disk will result in twodrops of the table. The table is raised by the toggle levers at eachcorner thereof so that a uniformmovement is secured and a fineadjustment of the parts may be secured by the arrangemenfl of the turnbuckles for each set of toggles.

It will be observed that in operation all of the toggle-levers break inthe same direction simultaneously, that is, inwardly or out wardly withrespect to the axis of the shaft 2. This is accomplished by the use ofthe arm 3 being secured to the shaft 2 intermediate its ends, as beforedescribed, thereby roviding a crank-arm on opposite sides of he shaftwhich ush simultaneously in one direction to break the toggles outward]and pull in the OEJOSltG direction to brea the toggles inwa 1y. By thusoperating the toggles in this manner, each pair on opposite sides of theshaft 2 tends to balance or counteract the lateral thrust on the guidemembers 15-16, thereby avoiding undue frictional contact between saidguide memhers and permitting th table!) to rise and fall easily.

It will of course be understood that the hand lever is only used whenthe power means are disconnected from the machine, as when the machineis being operated by the power the hand lever is unnecessary.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readil apparent.

I desire it to be nnderstoo that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall with in the scope of the appended claims.

W hat El claim is '1. A device of the class describedcom'prising aframe, a table thereon necting the table with the frame, a rock shaftjournaled in the frame, adjustable means for connecting the togglelevers with the shaft and means for rocking the shaft.

2. A device of the class described comprising a frame, a table supportedthereon, toggle levers connecting the table with the frame, a rockshaft, turn buckles connecting the toggle levers with the shaft andmeans for rocking the shaft.

3. A device of the clam described comprising a frame, a table supportedthereon, toggle levers connecting each corner of the table with theframe, a rock shaft journaled in the frame, arms connected with theshaft intermediate their ends, turn buckles connecting the toggle leverswith the ends of the arms and means for rockin the shaft.

4. A device of the class descrlbed comprising a frame, a table supportedthereon, toggle levers connecting the table with the frame, a rockshaft, means for adjustably connecting the toggle levers with saidshaft, a hand lever connected with the shaft by a pin and slotconnection and power driven mechanism adapted to be connected with theshaft when the hand lever is not to be used, said mechanism including ashaft, a crank pin connected therewith and a link having one andconnected with the rock shaft and other end slotted and engaging thecrank pm.

5. A jarring machine embodying a base, a table, means for lifting anddropping the table, means for guidin the table with respect to the base,said lifting and dropping means embodying four toggles connecting thetable to the base and disposed at the corners of the table, and devicesfor simultaneously breaking all the tog les outwardly away from thecenter line 0 the machine and alternately breaking all the togglesinwardly toward the center line of the machine to'thereby neutralizelateral thrust and thus relieve the guiding means of strains.

6. A jarring machine embodying a base,

toggles con- 5 the table to the base, a rock-s aft in the base a table,means for lifting and droppin the motion connection, arms on the ends ofthe table, means for guiding the table Wit reshaft spect to the base,said lifting and dropping the a means embodying four tog les connectingP j g in opposite directions from and links connecting m o the toggles.

eunto afiix my sis of the shaft, the ends of said arms t In testimonywhereo at a point between the toggles, a mechanism signature this 23 dayof A for operating the shaft embodying a lost- 6. COBLE.

